Trolley-head.



J. E. ROBBINS & W. A. 65 C. P. KIRKPATRICK.

TROLLEY HEAD.

APPLICATION FILED H1B. a, 190s.

Patented May 11, 1909.

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J. E. ROBBINS & W. A. & C. P. KIRKPATRICK.

' TROLLEY HEAD.

APPLICATION FILED FEB. 8,1908.

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UNITED STATES PA'IENT OFFICE.

`TOI-IN E. ROBBINS, OF GREENSBURG, AND WILLIAM A. KIRKPATRIOK AND CLIFFORD P. KIRKPATRIOK, OF INDIANAPOLIS, INDIANA.

TROLLEY-HEAD i T 0 all 'whom it may concern:

Be it known that we, JonN E. Romains, a citizen of the United States, residing at Greensburg, in the county of Decatur, State of Indiana, and WILLIAM A. KIRKPATRICK and CLIFFORD F. KIRKPATRICK, citizens of the TJnited States, residing at Indianapolis, lilarion county, State of Indiana, have invented certain new and useful Improvements in Trolley-Heads, of which the following is a specilication.

Our invention relates to an improved trolley head provided with means for assisting in the replacement of the trolley wheel on the wire said means also serving to reduce the liability of displacement due to inequalities of the trolley wire or of the motion of the car.

The accompanying drawings illustrate our invention.

Figure 1 is a side elevation of a trolley head constructed in accordance with our invention g Fig. 2 a plan 5 Fig. 3 an end elevation in half vertical section 5 Fig. 4 a vertical section showing the positions assumed by the parts when the trolley wheel is drawn away from the trolley wire; Fig. 5 a vertical sectional detail on line 5 5 ot' Fig. 2.

In the drawings 10 indicates a harp or head casting having formed in the lingers thereof a pair of substantially vertical guideways 11. in each of which is mounted a sliding head 12 each of said heads being normally urged upwardly to one extreme of the guideway by a light spring 13. Secured in the head 12 and extending transversely between the lingers of the harp 1() is a journal pin 14 upon the middle ol which is j ournaled a trolley wheel 1 5 ol any desired type. The ends 14 of pin 14 which are secured in the blocks 1 2 are preferably slightly ensmalled and this ensmalled portion has a length somewhat greater that the thickness ot' the block 12 so that there may be ournaled thereon between each side of the trolley wheel 15 and the adjacent block 12 a guard -linger 16 the end of which is outwardly flared as clearly shown in Fig. 2. At the inner end of this linger 16 is a short 'Enger 17 which is outwardly displaced relative to the general plane ol the linger 16 and arranged beneath a pin 18 on the adjacent arm of the harp 1() and normally in engagement with the linger 17. Arranged in the path of possible movement olt each linger Specification of Letters Patent.

Application led February 8, 1908.

Patented May 11, 1909.

Serial No. 414,952.

' 17 is a spring 19 each of said springs being` secured to the adjacent block 12.

In order to obtain the proper electrical connection with the trolley wheel we provide a sheet metal yoke 20 the ends of which are slipped over pin 14 closely adjacent the hub ends of the trolley wheel 15 and this yoke is secured at its base or middle to one end of a U-shaped spring 21 the opposite end of said spring being secured in the throat of the harp 10. When the trolley wheel is in engagement with the trolley wire 25 as shown in Fig. 1, the weight of the rearwardly project- Aing ends of the lingers 16 cause the lingers 17 thereof to remain in engagement with their pins 18 and the springs 13 will be compressed until the blocks 12 come to rest against the shoulders 26 formed at the lower ends of the guideways 11, this compression ol the springs 13 being due to the fact that such springs are comparatively light and of course materially weaker than the spring which is commonly used to hold a trolley pole in operative position. So vsoon as the harp 10 tends to move downward however so as to withdraw the trolley wheel 15 from the trolley wire 25 the springs 13 serve to urge the blocks 12 upwardly in their guideways 11. This movement causes the arms 17 of lingers 16 to be swung downwardly by their coaction with pins 18, and lingers 16 are thus swung upwardly toward the position shown in full lines in Fig. 4, thus producing a comparatively wide and llaring throat immediately above the trolley wheel so as to prevent many displacements of the trolley wheel and to facilitate replacing.

If the trolley head should be drawn down away from the trolley wire to the position shown in Fig. 4 where the upper ends olt fingers 16 are still in position to be engaged by any cross wires, a backward movement of the car will not injure the structure because the lingers 16 are free to be displaced, through the positions shown in dotted lines in Fig. 4, against the action of the springs 1Q but as soon as such springs are llexed by such action they will immediately serve to snap the lingers 16 back past the vertical center a trolley, of a contact carrying member mounted therein and substantially vertically movable therein, yielding means for urging said contact member to its upper position in the head, a pair of pivoted lingers arranged adjacent said movable member, means for l causing a swinging of said lingers by a movement of the contact member in the main head, and yielding means arranged in the path of movement of said lingers to engage the same when in abnormal position and return them to normal.

2. The combination with the main trolley head, of a pair of blocks substantially vertically movable therein, springs for yieldingly urging said blocks to their upward position,

a cross pin carried by'said blocks, a trolley wheel journaled thereon, a pair of lingers pivoted on said cross pin and each having an outwardly flared rear end and an inner linger,

pins carried by the main head for engaging said inner 'lingers to swing said pivoted lingers by movement of the blocks in the main head, and returning springs 19 arl ranged in the path of movement of the pivoted lingers.

In witness whereof, we have hereunto set our hands at Hot Springs, Arkansas, and Indianapolis, Indiana, respectively.

JOHN E. ROBBlNS. WLLIAM A. KIRKPATRICK. CLIFFORD P. KIRKPATRICK.

vWitnesses to signature of Robbins:

W. G. FORDHAM, A. J. MURPHY. Witnesses to signatures. of Kirkpatrick and Kirkpatrick:

ARTHUR M. HOOD, THOMAS W. MCMEANS. 

